The STBR-TEAF_-.40-.65 from Sintec Optronics is a Acousto-Optic Tunable Filter with Wavelength Range 400 to 650 nm, RF Frequency Range 110 to 220 MHz (Drive), Resolution 0.5 to 5.1 nm, Diffraction Efficiency 70 to 90%, Spectral Range 400 to 650 nm. More details for STBR-TEAF_-.40-.65 can be seen below.